Mold.



J. R. HARPER. mom). APPLICATION FILED 13110.8, 1909.

1,120,478, PatentedDec. 8,1914.

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MOLD.

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A B0. 8, 1909. 1,1 20,478. Patented Dec. 8, 1914;

UNI D STATES PATENT OFFICE.

JOHN R. HARPER, OF MENAR-D, ILLINOIS.-

MOLD.

To all whom it may concern I Be it knownthat I, JOHN R HARPER, a citizen of the United States, residing at Menard, in the county of'Randolph and State of Illinois, have invented new and useful Improvements in Molds, of which the circular core extending inwardly thereof at right angles-to thefirst core and having the inner end thereof recessed to lug the adjacent portion': of said first core so that in the molding of the, block right angular passages may be formed therein.

It is also my purpose to provide a mold of the class described which will embrace the desired features of simplicity, efficiency and durability, one which may be readily assembled and knocked down and one which may be manufactured and marketed at a minimum expense.

With the above and other objects in view, the invention consists in the construction, combination and arrangement of parts hereinafter set forth in and falling within the Iscope of the claim.

In the drawings, forming a portion of this specification and in which like numerals of reference indicate similar parts in the several views Figure 1 is a perspective View of a series of blocks constructed by my improved mold, the said blocks being arranged with respect to each other. to form a chimney. Fig. 2 is aperspective view of the mold. Fig. 3 is a plan view of the base member or element forming the platform for the mold. Fig. 1 is a transverse section taken through the mold. Fig. 5 is a detail perspective viewof one of the side members of the mold. Fig. 6 isa perspective view of one of the end members of the mold. Fig. 7 is a perspective view of a different form of base member or element forming the plat form in the construction of another form of block from that shown in Fig. 2. Fig. 8 is a perspective view of another form of side member. Fig. 9 is a perspective view of a Specification of Letters Patent. f t t 8, 1914 Application filed December 8, 1909. v

Serial No. 532,003.

still further'form of side member. Fig. 10 1s a similar view of another form of side member. Fig. 111 is a'perspective view of another form of base member or element forming the platform in the construction of another form: of block. spective view of the partition'plates.

Fig. 12 is a per- 1 Referring now moreparticularly to the drawings, andwith particular reference to Figs. 2, 3 and 4 thereof, there is shown a mold 1 comprising a base member or element 2'adapted to form the platform for the mold. The base member or element 2 is provided with a rabbeted edge portions 3, and

as shown, the said member or element is formed at one side with an offset portion 1 for a purpose to behereinafter more fully described. v A vertically extending core 5 is carried by the base member or element and is preferably formed integral with the same as will be clearly seen upon reference to or element so that the front and rear wallsof the core are equally spaced from the front and rear edges of the base member or element 2.

The mold is provided with a front wall "Fig. 4 of the drawings, but I do not desire 6 having an offset portion 7 to conform to the offset portion 4 of the base member or element and the lower edges of this wall are seated in the rabbeted portion 3' at the front edge of the base member or element. The I laterally extending wing portions 8 and 8 or suitable fastening devices 12 so that the' front wall can be easily detached'from the end wall 11 as will be appreciated. The rear wall 13 of the mold is constructedfrorn a fiat piece of metal or suitable material and is connected to an end wall 14 by straps similar to the straps 9 and 10. The opposite end of the rear wall 13 is connected to the rear end of the end wall 11 in a manner similar to the strap connections hereinbe-.

foredescribed. The wing portion 8 of the front wall 6 carries a staple or the like 16 which has pivotally connected thereto a strap or hasp element 17 having'a right angularly extending portion 18 provided with a longitudinally extending slot 19 adapted to receive a rotatable locln'ng key or fastener 20 engaged with the end wall 14. The top of the core 5 lies fiush with the upper edges of the walls of the mold so that when a block is formed itsfupper surface will be a plane surface.

The knuckles of he straps on one wall section are arranged in coincidence with the knuckles of the straps on the adj acent wall section when the sections are set up, and as shown, the said knuckles embrace the wall sections so as to hold them rigid. This is not only desirable for the reason that the blocks can be. molded with accuracy but that considerable strain is relieved from the :pivot pins 12. The pins'12 are removable for the purpose of allowing them to be interchangeably connected with any of the mold section walls. From the construction of mold described in Figs. 2, 3 and 4 of the drawings, it will appear that a block-as illustrated at A in Fig. 1 of the drawings is formed'having outwardly extending wings A and a centrally located outwardly extending or olfset portion B. The provisionof the core 5 is such that the block A is formed with a vertically extending passage or flue as will be readily understood. 1 i

Upon reference to Fig. 7 of the drawings, the base member or element 21 is somewhat similar to the element or member 2 previouslyreferred to,bu t in this instance theele ment or member carries at one end an ofiset portion 22 having a' semi-cylindrical vertically extending core 23'. The wall 24 carries a. strap or hasp 26similar'to the strap or hasp WVhen thefwall 24 is connected with the walls 11,13and 14 and applied to the base member or element 21 it will be seen that when concrete or other'plastic substance is poured into the molda block will be formed like the one shown at C in Fig. 1 of the drawings, the said block being provided with an offset jportion C and by the provision ofthe semi-cylindrical core 23 the block-C will consequently be provided with a correspondingly shaped passage or flue. -Upon referenceto Fig.9v of the-drawings, .itwill be seen that -I employ a front wall 27 havingan ofl'set portion 28 which carries at its lower extremity an ar'cua'te 'inwardly extending'core 29. I us'e in connectionwith the wall 27 the end walls and the rear wall hereinbefore described and use the plurality of walls in combination with the core 29 will lie against the end wall 11 and the inner edge of the core will lie against a portion of the core 23 so that when plastic substance is poured into the mold a block like the one shown at D in Fig. 1 of the drawings will be formed andprovided with an offset portion D having an arcuate horizontally disposed fiue forming cavity D By providing the core 23, the said block D will also-have formed therein, as will be'understood, a vertical flue 'or passage adapted to alinewith the flue or passage formed in the blocks B and C. The block E used in conjunctionwith the block is formed in a manner similar to the block D, but in lieu of the wall 27 I provide a wall 30 having an offsetportion 31 that carries a core The difference in this form of wall is that the core 32 is formed or located at the I right hand end, whereas in the wall 27 the centrally located offset portion 34and "outwardly extending wing portions 35; This form of wall is used in conjunction with the base member or element 2 and with the'walls 11, 13 and 14 describedin the form of my invention shown in Figs. 2, 3 and 4. The offset portion 34 is provided with an inwardly directed semicylindrical horizontally disposed core 36, the lower 'side edges of which are adapted to rest upon the platform when the mold sections or walls are in an operative position. The core 36 is provided at the rear edge thereof with a concavity 37 arranged to tightlyhug a portion of the core 5. When constructing a block, using the walls 11, 13, 14 and 33 it will be seen that after concrete substance has sufficiently hardened to form a substantial'block, the block may be inverted and will be of a form shown at F in Fig. l'of the drawings and will carry an offset ,portion F and outwardly extending wingsIF similar to the wings A of'the block A. By providing the core 5 the block F'will have a centrally located vertically extending passage or flue, and the oifset portion F of the block will be formed with a semi-cylindricalcavity or passage F located directly beneath the cavity D and the said cavity "F will conview of the fact that it carries an ofiset portion 31 located at the right hand end instead of at the left hand end shown in the wall 27 in Fig. 91 of the drawings is used in conjunction with a base member or platform 38 similar to the base member or element 21, the diflerence being in the provision of an offset portion 39 at the right hand end and a verticallyextending semi-cylindrical flue 40 projecting upwardly from the offset portion 39. o

The construction of mold is such that the blocks when formed will all be of a uniform length, and should I desire to form blocks of less length than I have hereinbefore shown, removable partition strips 41 are used and are adapted to be disposed between the front and rear walls of the mold and may be clamped thereto temporarily in any desirable manner. 'The partition strips 41 are1 provided with handles 42 at their upper on s.

A mold as herein constructed by me will be found extremely useful in view of the fact that blocks of various character may be formed and assembled to provide a chimney as shown in Fig. 1 ofthe drawings. The construction of blocks is such that a plurality of spaces Gare provided between the blocks to receive joists or beams in building construction.

I claim I A mold comprising a base member having a vertically disposed core, end walls, a rear wall, a front wall cooperating with said end and rear walls, said walls being positioned upon the-marginal edges of the base member and inclosing the core and spaced apart therefrom, detachable connections between said walls,gand a hollow semicircular core carried: by said front wall and extendin inwardly thereof at right angles to the %rstmentioned core and having the inner end thereof recessed to hug the adjacent portion of the first-mentioned core.

In testimony whereof I. aflix my signature in presence of two witnesses.

J R. HARPER.

Witnesses:

P. C. CLIPPORD, W. P. EDMONDSON.

Copies of this patent may be obtained for five cents each, by addressing'the Commissioner oi Patents, Washington, D. G. 

